menu_1 = ("回锅肉", "青椒肉丝", "麻婆豆腐", "烤乳猪", "烤羊腿")
for f in menu_1:
    print("old menu:" + str(f))
# menu_1[0] = "九转大肠"
print("\n")
menu_2 = ("回锅肉", "上海青", "炖牛腩", "烤乳猪", "烤羊腿")
for f in menu_2:
    print("new menu:" + str(f))
